If you can get the ride height you want with struts and springs then coilovers might be overkill. I have coilovers due to the fact that I wanted more of a drop than most springs for our cars provide, but once I got the ride height dialed in they have not been adjusted since. Also if I had to DD my car I wouldn't have it quite as low as it is, winter and the MN roads proves to be a little challenging with a lowered car. I also have coilovers on my DD but it doesn't sit as low as the Contour and price was the deciding factor for that car, the coilovers were a great deal in that case. Both cars were adjusted upon install and haven't been changed since.
I have no regrets about running coils on either of my cars.